Tire-making machine



May 41, 1923. w.

J. M. MYLRUHE TIRE MAKING MACHINE Filed July 28 1919 Patented May 1, 1923.

UNITED STATES PATENT OFFICE.

JOI-IN M. MYLROIE, OF AKRON, OHIO, .ASSIGNOR TO THE GOODYEAR TIRE RUBBER,

COMPANY, OF AKRON, OHIO, .A CORPORATION 0F OHIO.

frrnnarnrzrne runoirmn Application filed July 28,

To all 'Lo/7mm t may concern:

Be it known that I, Jol-IN M. MYLRoin, a citizen of the United States, and resident of Akron, Ohio, have invented new and useful Improvements in Tire-Making Machines, of which the following is a specification.

My invention relates to improvements in pneumatic tire making machines and has particular reference to a machine for stitch 1.0 ing or shaping the fabric wound on a core to form the tire casing.

The main object of my invention is to provide a machine which will, in a satisfactory manner, shape or stitch7 the :fabric in place on the core, without the formation of wrinkles, and so that the fabric will adhere closely to the form of the core, producing a smooth surface.

A further object of my invention is to provide a machine wherein the stitching elements are automatically maintained in defi nite and proper relation to the core and the fabric Wound thereon. y

The above and additional objects and advantages `of a similar nature, which will be hereinafter more specifically treated, are preferably accomplished by such meansI as are illustrated inthe accompanying drawings, described in the following specification,

' 4and then more particularly pointed out in the claims which are appended hereto and form a part of this application.

In the drawings wherein I have illustrated a preferred embodiment of my invention, and in which like reference numerals designate like or corresponding parts:

Figure 1 is a perspective view of my irnproved device as applied to a tire forming machine;

Figure 2 is a plan view showing the core and fabric thereon in horizontal section; and

Figure 3 is a detail section of the stitehing elements taken on line 3--3 of Figure 2.

A core is suitably mounted for rotation on a chuck 11 of usual construction. On this core the fabric is wound in the usual manner, the means fork winding the fabric and the means for rotating the chuck not being shown, as they are well know-n in the art and constitute no part of my invention.

`The stitching mechanism 12, is mounted on a carriage 13, whichv is in turn slidably adjustableon a base 14, by means of the usual hand wheel 15.

The stitching mechanism consists ofa 1919. Serial No. 313,958.

plate 16 bolted to the carriage 13 and having a pair of stitcher bearing arms 17 pivotally mounted thereon at 18. Suitable stopposts 19 are provided for limiting the degree of movement of the stitcher arms 17.

For the purpose of regulating the pressure of the stitchers and maintainiing` themin contact with the core, a plate 20 having an operating handle 21 is pivoted to the plate 16 at 22 and has two cam slots E23, in which upstanding lugs 211, one at the inner end of each stitcher bearing,- arm 17, are adapted to slide as Ithe handle 21 is turned from right to left. Hence, as the handle 21 is thus turned the stitcher bearing arms 17 are swung on their respective pivots to increase or decrease the pressure of the stitchers on the rolls, and cause the stitchers to follow the contour of the core periphery.

To the other end of each arm 1T is pivoted a bifurcated or U shaped element 25, which carries a pair of circular discs E2G' and 27, the latter being mounted on the opposite faces of a wedge shaped bearing 28 which is pivotally mounted between the bifurcations or legs of the U shaped element 25, on a suitable vertical journal bearing 29. The discs 16 and 27 are mounted so as to rotate on the bearing 28 and suitable antifriction devices may be provided to insure their easy rotation.

The pivot point formed by the journal 29 is arranged so as to be close to the coroI in order to give stability to the stitchers.

The discs 26 and 27 are of substantially the same diameter. in this respect; the disc 27 which is in reality the stitcher disc, has a beveled edge 27, while the disc 26, which acts in the nature of a guiding disc, has a rounded edge 26a.

The ope 1ation of my device is as follows:

A. strip of fabric is first wound on the coro 1() in the usual in anner, and a tread roll, not shown. applied to roll. down the tread portion. The hand wheel 15 is then manipulated to advance the carriage 12% toward the core, and bring the discs 26 and 27 into contact with the fabric as shown in Figure The purpose of the arrangement shown is particularly to maintain approximately the same angular relation between the stitcher disc and the fabric wound on the core so that the fabric is stitched down smoothly and with a uniform stretching thereof.

This function is secured by the guiding action yof the disc 2G, which, of course, bears They differ, however,

llO

a fixed angular relation to the opposite stitcher disc 27, so that as the carriage is advanced the stitcher also moves about the core pressing the fabric smoothly against the core-or previously laid .fabric ply-.With a force applied in such a direction outwardly as to properly stretch the fabric toward the base portion as it is applied. The stitcher is, moreover, automatically retained in the same angular relation to the circular portion of the peripheralsection of the core, but the angle is necessarilyV changed somewhat as the stitcher leaves the circle. Further, the stitcher follows. the form of the coreinto the beadportion of the tire, both before and after the application of the bead, (see the dotted lines in'Fig. 2).

While I have shown and described a specific embodiment of my invention, it will be understood that changes and modifications may be made that come Within the scope of the claims hereto appended, Without in any Way departing from the spirit of my invention as definedthereby.

WhatI claim is:

l. In an apparatus of the character described, astitcher bearing element, a stitcher member revolubly mounted o n said element, a guiding core-engaging member also mounted on said element, and means for Jivotally Vsupporting said element', the airis of the pivot extending intermediate the stitcher member and guidingmember.

2. In an apparatus of the character described, a stitcher bearing element, a stitcher disc revolubly mounted on said element, a guiding disc also revolubly mounted on said element, and a bifurcated element for pivotally supporting said stitcher bearing element between the bifurcations of the bifurcated element.

3. In an apparatus ,of the character described, a stitcher bearing element, a stitcher discvrevolubly mounted on said element, a guiding disc also revolubly mounted on said element, a bifurcated element for pivotally supporting said stitcher bearing element between the bifurcations of the bifurcated element, and means for operating said bifurcated element.

4. In an apparatus of the character described, a stitcher bearing element, a stitcher discrevolubly Vmounted on said element, a. guiding also revolubly mounted 0n said element, a bifurcatedelement for pivotally supporting said stitcher bea-ring element between the bifurcations ofthe bifurcatedelenient, andmeans for operating said bifurcated. element, said. means comprising an adjustable carriage to which V'said bifurcated element connected.

5. In anvapparatu's of thel character described, anadjustabl'e carriage,l pivoted, arms connectedftheijfeto, a bifulfated element pi"- tlly 'mounted on the Aend of each arrn, a

stitcher bearing element pivotally mounted on said bifurcated element, a revoluble stitcher, a guide carried by said stitcher bearing element, and means for adjusting the carriage.

v 6. In an apparatus of the character described, a revoluble core, a pivotally mounted stitcher bearing element, a revoluble stitcher disc, means for moving said stitcher disc around the periphemlportion of said core, and core engaging means adapted to automatically maintain the stitcher disc in substantially the same angular relation to said core during the stitching operation.

7. In an apparatus of the character described, a rotatable core, pivotally mounted stitcher bearing elements, a rotatable stitcher disc connected to each of said stitcher bear ing elements, means for movi ,the stitcher bearing element transversely hlizthe `Core periphery, and means adapted to follow the path of each stitcher disc to automatically maintain said discs in their pro er angular relation with respect to the p ane of the core during the stitching operation.

8. In an apparatus of the character de.- scribed, a rotatable core, a rotatable stitcher element, means formoving the stitcher element transversely of the cor periphery. and means adapted to f ollow t"l1e.y ath ofthe stitcher element to automatica `v .ruaintain said element at its properrangular Yrelation with respect to the core during the stitching operation. y

9. In an apparatusof the ,character described. a revoluble core, a air of revoluble stitcher elements, means `or moving said stitchers around4 the peripheral portion of said core. core engaging means operated in accordance with the position of the respective stitcher elements on the core for mai taining each stitcher element in substantial v the same angular relation to said core Vas it moves around said core, and means f or varying the pressure of the stitchers on `the core.

10, In. a tire building machine including a rotatable tire supporting core, a stither carrying Aarm adapted for movement transversely of the core, and a stitcher, unit prising a plurality of spaced rotatablediscs mounted upon the arrnto oscillate in unison with respect thereto about a lcommon axis While in peripheral contactvwith a tire.

11. In a tire building rnachineincluding a rotatable supporting core and ,a recipro cable carriage. :i st itcher car' in arm mounted upon the carriage and d dapltlved for movement. transversely of the ,corta and stitcher unit con rising a lulfality of spaced rotatable isos ,minted upn..the

' arm, the axes of rotation of thedis'cs being arranged in fine' 'relative angular relation.

said stitcher unit being pivobatllymounted on the arm for free ivotal niovenient rltive thereto during opration.

intense 12. 'ln a tire building machine including a rotatable tire supporting' core and a re ciprocable carriage, a stitclier carrying arm mounted upon the carriage and adapted for movement transversely oi".v the core, and a stitcher unit comprising a plurality olf' spaced rotatable discs mounted upon the arm to oscillate in unison with respect thereto and about a common airis7 the axes et rotation ot the discs being arranged in relative angular relation.

'l-l. In a tire building machine including a rotatable tire supporting core and a reciprocable carriage, a stiteher `carrying arm mounted upon the carriage and adapted for movement transversely of the core, and a stitcber unit comprising a plurality ot' spaced rotatable discs .mounted to oscillate in unison upon the arm about a common axis offset trom their ailes ot rotation.

le. In a tire building machine including a rotatable tire supporting core and a reciprocable carriage, a stitcher carrying arm mounted upon the carriage and adapted for movement transversely ol." the core, and a stitcher unit comprising a plurality of spaced rotatable discs mounted upon the arm and having their respective planes oit rotation arranged in relative angular relation, said stitclier unit being pivoted ttor 'tree oscillatory movement relative to said, arm during operation.

l5. In a tire building machine including a rotatable tire supporting core and reciprocable carriage, a stitcher carrying arm mounted upon the carriage and adapted for movement transversely of tbe core, and a stitcher unit comprising a plurality et spaced rotatable discs adapted to oscillate in unison upon the arm about a common axis, the respective planes of rotation of the discs being arranged in relative angular relation.

16. In a tire building machine including a rotatable tire supporting core and a reciprocable carriage, a stitcher carrying arm mounted. upon the carriage and adapted for movement transversely oit the core7 a stitcher unit comprising a plurality of rotatable discs arranged to oscillate in unison upon the arm about a common artisj the 'axes ot rotation ot the discs being arranged in relative ai'igular relation and odset from said axis ot oscillation.

In testimony whereof: l have signed my name in the presence of two subscribing Witnesses.

JOHN M. MYLROIE. lllitnesses JOHN E. KEATING, E. C. LEADENHAM. 

